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Webrequest.GetResponse() Hangs after three or four times

Posted on 2004-08-05
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Last Modified: 2013-12-27
Dear ALL

I am using visual studio 2003.

I use  this function for get the html file from web server .
----------------------------------------------
Public Shared Function GetResponseStringA(ByVal RemoteURL As String) As String

Dim StartTime As DateTime = DateTime.Now()
Dim DownloadContent As String
Dim objRequest As Net.WebRequest, objResponse As Net.WebResponse,
objStreamReceive As System.IO.Stream, objEncoding As
System.Text.Encoding, objStreamRead As System.IO.StreamReader

Try
    DownloadContent = ""
    objRequest = Net.WebRequest.Create(RemoteURL)
   
    objResponse = objRequest.GetResponse
    objStreamReceive = objResponse.GetResponseStream
    objEncoding = System.Text.Encoding.GetEncoding("utf-8")
    objStreamRead = New System.IO.StreamReader(objStreamReceive,
objEncoding)
    DownloadContent = objStreamRead.ReadToEnd()
   
    If Not objResponse Is Nothing Then
        objResponse.Close()
    End If
   
    Return DownloadContent
Catch ex As Exception
     msgbox(ex.message)
End Try

End Function
--------------------------------------------------------------

This function works finely for few times

After five or six times . It hangs on the line
           objResponse = objRequest.GetResponse.

How to fix that problem

Prakash
0
Comment
Question by:prakash_prk
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13 Comments
 
LVL 37

Expert Comment

by:gregoryyoung
Comment Utility
could you define "hangs" ? does it hang indefinately or does it eventually come back with an exception ?

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Author Comment

by:prakash_prk
Comment Utility

It means that .

It waits for a long time  and throws a  timeout exception for all requests after three or four times.

At the time I check that request URL in IE .It works fine.

How to solve this error gregoryyoung

bye
Prakash


0
 
LVL 37

Expert Comment

by:gregoryyoung
Comment Utility
ok, so its timing out while IE still works ? what type of network are you running on ? wireless lan serial etc.
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Author Comment

by:prakash_prk
Comment Utility

I am testing with my PPC 2002 Emulator.

My Network a simple LAN of ten Computers connected to a network switch.
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LVL 37

Expert Comment

by:gregoryyoung
Comment Utility
well on the emulator i would put it as pretty likely that its the emulator causing it. You can only use an emulator for your most basic testing, a real device is absolutly needed.
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Author Comment

by:prakash_prk
Comment Utility

Thank you for giving a good idea  gregoryyoung . I don't think on that area.

I try to  check my code in a PPC device

Thank you very much
Prakash

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LVL 10

Author Comment

by:prakash_prk
Comment Utility

hi  gregoryyoung .

The error Continous my PPC Device also  gregoryyoung.

what I to do ??

bye
Prakash
0
 
LVL 37

Expert Comment

by:gregoryyoung
Comment Utility
ok ... lets try to write a very simple program that only has a button and a hard coded call to yahoo.com .... do you get the same behavior ?
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LVL 10

Author Comment

by:prakash_prk
Comment Utility
Hi gregoryyoung

I found the solution ..

It is a simple mistake by myself.

I have one more function in my program named UploadFile() it uploads a file to server from PDA.
I didn't  call the close method of WebResponse,WebRequest,Stream objects in the UploadFile() . On this day I see this code and add close methods the code .
The web response in GetResponseString() works well.

There is no link between this two functions. both of them are resides in different Classes. Both of them uses different variables ??

What going wrong ???

0
 
LVL 10

Author Comment

by:prakash_prk
Comment Utility

Hi gregoryyoung

Thank you for your good suggesstions.

reagrds
Prakash

0
 
LVL 37

Expert Comment

by:gregoryyoung
Comment Utility
they use the same underlying code in the framework ... it may have been that you were leaving open file handles ...
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